Motorcycle



M. GOUDARD AND M. MENNESSON.

MOTORCYCLE.

APPLICATION FILED JUNE 4, 1919.

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M. eoumum AND M. MENNESSON.

MOTORCYCLE.

APPLICATION FltED JUNE 4, 1919.

Patented Mar. 15, 1921.

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w w w w UNITED STATES PAJENT QFF ICE.

MOTORCYCLE.

Specification of Letters Patent.

Patented Mar. 15, 1921.

Application filed June 4, 1919. Serial No. 301,742.

tion of the frame of motor cycles in a more practical manner than has been the case hitherto.

It consists essentially in so constructing the frame of a motor cycle, with the use of a single tube that the frame will have the general appearance of the frame of a ladys motor cycle, that is to say shall be open;

shall comprise between the wheels of the motor cycle a horizontal or slightly inclined portion, suitable for supportin the luggage carrier and the foot rests; shall comprise at the right of the rearmotive wheel a curved portion surrounding the motor and servin as means for attaching this latter, an shall terminate at the rear extremity in a branch which may be eventually bent into a plane perpendicular to the central plane of the back wheel and be adapted for the support of the saddle.

The invention includes in addition to this principal construction, certain other features which will be more particularly described hereafter.

It includes more particularly certain constructional embodiments as well as the application of the said features and more particularly and as new industrial products, motor cycles comprising the said features as well as special parts suitable for their construction.

It will in any case be well understood with the assistance of the following description and the accompanying drawing which however as will be clearly understood are given merely by way of example. i I

Figures 1 and 2 of the drawings show respectively in side elevation and in rear ele vation a motor cycle constructed according to the invention.

Fig. 3 is a section on line 3-3 Fig. 1

but, to a larger scale than the preceding figures, illustrating a detail of construction of the motor cycle.

Fig. 4 is a plan view of the tubular frame.

According to the invention and more particularly according to the methods of carrying the same into efi'ect illustrated on the drawings, we construct the motor cycle in the following or in some analogous manner.

a is a steering fork, supported by the front wheel 6. 0 is a motor supported through the intervention of its casin 0 by the back wheel d of the motor cyc e, the two wheels being preferably plain. In the casing of the motor is mounted the axle d of the back v wheel (Z carried by suitable bearings, the said axle being connected to the motor shaft by suitable transmission gearing, for instance gearing corresponding in the arrangement described in the application for French Patent No. 486324, filed in the same names on October, 1916.

v e is a tubular framework which is preferably given the general shape ofthe frame 'ofa ladys motor cycle, that is .to say an open shape. o

It may be for instance formed from a single tube connecting together the steering fork a and the back wheel 03. With this ob ject in view we preferably'connect the said tube at the end to the rear portion of the socket a of the steering fork a, for instance in the median plane of the rear wheel. We cause itlfirst to descend in a straight line at a short distance from the front wheel, and

we then extend it horizontally or at a slight inclination in the same plane, so that we can mount on this portion a luggage carrier 7 and a foot rest 9, the latter being constituted for example by two U-shaped irons parallel to one anotherstretching over the tube 6 and clamped to the upper portion of the latter by means of stirrup shaped clamps g? embracing the lower portion of the said tube,

the upper arms of the stirrups passing vertically through the said U-shaped irons and the luggage carrier, which latter is fixed to the foot rests by means of nuts g screwing on to screw threaded extremities of the arms 9 of the stirrups.

In the neighborhood of the forward portion of the back wheel, the tube 6 is bent twlce at r1ght angles in a horizontal plane,

in such a way that the said tube extends be yondthe bend at the side of the back wheel in a planeparallel to the median plane of the said back wheel. It is then bent again in the said parallel plane so as to embrace the lower and rear portion of the casing 0 of the motor. It is then continued into astraight portion at an angle directed toward the in terior of the motor cycle, where it terminates at the height at which the saddle 7a is to be supported, after having given it a last bend in a horizontal direction and at right angles so as to bend it toward the interior of the -motor cycle.

The saddle is attached in any appropriate manner at the end of the tube 6 and in order that the weight of the person mounted upon the motor cycle shall counterbalance substantially the weight of the perof the motor and of the said tube projecting on one side .ef the machine, we displace to a suitable amount the said saddle to the opposite side to that on which the projecting parts are'located. 'lhe motor '0 is attached by means of its caslng c ,for 1nstance by'using stirrup shaped pieces 0 or pieces of someanalogous shape extending around the outer portion of the tube a, the arms being screw threaded at the ends for the reception of'nuts c? screwing against shoulders carried by the casin 7 An exhaust tube 0 is provided in such a position thatit extendsbackward at the side of the driving wheel. The said motor may comprise a single cylinder located between two branches of the V formed by the tube, or two cylinders arranged as a V may be located in the same position, or better, still two oppositely directed cylinders may be employed,

the latter cylinders being arranged at the side of the plane. V,

The tube 6 may with advantage constitute the reservoir for the liquid fuel, in which case we make it of appropriate section and provide it with a filling orifice 0 ;We also prefer ltlJO contain the different controlling mechanisms which are necessary for the op i eration of the motor and for manipulating the brakes. 1T he controls are preferably pro vided in-the ordinary manner with Hear bio connections i of the lio wden type which enter the tube 0 in the neighborhood of the handle bar a and which come out of it in the neighborhood of and below thesaddle h, where they are bent around and directed toward'the different organs to be controlled.

The entryand exit openings of the said :flcfrible connections are located above the maximum level reached by the liquid fuel.

The constant level 7' or auxiliary reservoir for the liquid fuelmay with advantage ,made in one with the tubular reservoir 6 and may be connected in any suitable maner with the feed conduit forthe motor.

With this end in view, we may substitute for one of the stirrups c fixing the casing of the motor to the said tube, the chamber of the constant level which is attached to the lower portion of the tube 0 by means of bolts j connecting the said chamber to the casin and the float is so arranged that its use dle regulates the supply of the liquid fuel through an orifice c provided at the lowest particular constructional details which have been described; 011 the contrary, it includes all modification.

Having now particularly described and ascertained the nature of our said invention and in whatmanner the same is to be per formed, we declare that what we claim is 1. In a motorcyclaa framework comprismg a smgle contlnuous tube connected-at one end to the front fork head andso formed as to provide at the other end a- U-shaped portion adapted to ,partiallysurround and to support the engine. V

2. In a motorcycle, an engme, a frame comprising a tube connected at one end to the front fork head, thence extending downward, thence horizontally and havingits other end so shaped as to partially surround the engine and to constitute a supporttherefor, and extending upward and being so formed at its extremity as to provide a saddlepost. .7 i f 3. In a motorcycle, an engine, a frame comprising a tube connected at one end to the front fork head, said tube being adapted to serve as a hquid reservoir, an 1nletfor the liquid fuel in the front end of said tube,

said tube being so formedat its other end asto partially surround and support the engine, and an auxiliary reservoir and float feed device connected to and in communication with said tube adjacent the engine.

4i. In amotorcycle, an engine, a front fork head,a tube connected to said front fork head and adapted to. constitute an open frame for the cycle, said tube extending from the front forkhead in a downwardly inclined d1rect1on, thence horizontallyin a direction out of the median plane of the wheels, thence rearwardly parallel to the 1ned1a11 plane of the wheels, thence upward in said parallel plane, thence horizontally and upwardly, whereby said tube is adapted V to partially surround and support the, engineand terminate, in a saddle post.

5. In a motorcycle, a driven wheel, an engine adjacent said wheel and operatively connected thereto, a continuous tubular member constituting the frame of said cycle, said tubular member being so formed as to partially surround said engine, a front fork head connected to one end of said tubular member, and means for connecting said tubular member to said engine.

In testimony thereof We have hereunto set our hands in presence of the subscribing 

